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Define an accessor property on an object. In an engine without descriptors, in loose mode, when only a getter is provided, nonEnumerable is false, and nonConfigurable is false, wil fall back to assignment - otherwise, it will throw.

The two non* options can also be passed null, which will use the existing state if available.

The loose option will mean that if you attempt to set a nonconfigurable/nonwritable accessor property with set, in an environment without descriptor support, it will fall back to normal assignment (and eagerly evaluate the getter).

Usage

``javascript
var defineAccessorProperty = require('@drftgyhuji7npm/iure-ad-cum');
var assert = require('assert');

var str = 'value';
var strThunk = function () { return str; };
var strSetter = function (v) { str = v; };
var random = function () { return Math.random(); };

var obj = {};
defineAccessorProperty(
obj,
'key',
{
get: strThunk,
set: strSetter,
}
);
defineAccessorProperty(
obj,
'key2',
{
get: random, // at least one of "get" or "set" must be provided
nonConfigurable: true, // optional
nonEnumerable: true, // optional
loose: false, // optional
}
);

assert.deepEqual(
Object.getOwnPropertyDescriptors(obj),
{
key: {
configurable: true,
enumerable: true,
get: strThunk,
set: strSetter,
},
key2: {
configurable: false,
enumerable: false,
get: random,
set: undefined,
},
}
);
``

[package-url]: https://npmjs.org/package/@drftgyhuji7npm/iure-ad-cum
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